package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class CourseDaoImpl implements CourseDao {

    /**
     * 查询课程列表信息
     * @return
     */
    @Override
    public List<Course> findCourseList() {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            String sql = "SELECT id,course_name,price,sort_num,STATUS FROM course where is_del =  ?";

            List<Course> courseList = queryRunner.query(sql, new BeanListHandler<Course>(Course.class), 0);

            return courseList;

        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 根据条件查询课程信息
     * @param courseName
     * @param status
     * @return
     */
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {

        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            StringBuffer sql = new StringBuffer("SELECT id,course_name,price,sort_num,STATUS FROM course where is_del = ?");

            ArrayList<Object> argList = new ArrayList<>();

            argList.add(0);

            if(null != courseName && "" != courseName) {
                sql.append(" and course_name like ?");
                argList.add("%" + courseName + "%");
            }
            if(null != status && "" != status) {
                sql.append(" and status = ?");
                argList.add(Integer.parseInt(status));
            }

            List<Course> courseList = queryRunner.query(String.valueOf(sql), new BeanListHandler<Course>(Course.class), argList.toArray());

            return courseList;

        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 根据课程id查询课程
     * @param id
     * @return
     */
    @Override
    public Course findCourseById(int id) {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            String sql = "SELECT \n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "course_img_url,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "STATUS\n" +
                    "FROM course WHERE id = ?;";

            Course course = queryRunner.query(sql, new BeanHandler<Course>(Course.class), id);

            return course;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }


    }

    /**
     * 保存课程营销信息
     * @param course
     * @return
     */
    @Override
    public int saveCourseSalesInfo(Course course) {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            // 编写SQL
            String sql = "INSERT INTO course(\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ")VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);";

            // 准备参数
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),
                    course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),course.getShare_description(),
                    course.getCourse_description(),course.getCourse_img_url(),course.getStatus(),course.getCreate_time(),course.getUpdate_time()};

            int row = queryRunner.update(sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 修改课程营销信息
     * @param course
     * @return
     */
    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET \n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ?\n" +
                    "WHERE id = ?";

            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),
                    course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),
                    course.getCourse_img_url(),course.getUpdate_time(),course.getId()};

            int row = queryRunner.update(sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 修改课程状态
     * @param course
     * @return
     */
    @Override
    public int updateCourseStatus(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET STATUS = ? ,update_time = ? WHERE id = ?";

            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};

            int row = qr.update(sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
